CN108630085B - System for simulating house collapse - Google Patents

System for simulating house collapse Download PDF

Info

Publication number
CN108630085B
CN108630085B CN201810457082.0A CN201810457082A CN108630085B CN 108630085 B CN108630085 B CN 108630085B CN 201810457082 A CN201810457082 A CN 201810457082A CN 108630085 B CN108630085 B CN 108630085B
Authority
CN
China
Prior art keywords
force application
house
upright
wall
application mechanism
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201810457082.0A
Other languages
Chinese (zh)
Other versions
CN108630085A (en
Inventor
丁煦
王栋
茆弘民
王丁玎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hefei University of Technology
Original Assignee
Hefei University of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hefei University of Technology filed Critical Hefei University of Technology
Priority to CN201810457082.0A priority Critical patent/CN108630085B/en
Publication of CN108630085A publication Critical patent/CN108630085A/en
Application granted granted Critical
Publication of CN108630085B publication Critical patent/CN108630085B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09BEDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B25/00Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes

Landscapes

  • Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Physics & Mathematics (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Working Measures On Existing Buildindgs (AREA)

Abstract

The invention discloses a system for simulating house collapse, which comprises a house frame mechanism, wherein the house frame mechanism comprises four vertically arranged stand columns and four cross beams for connecting the upper end parts of two adjacent stand columns, the house frame mechanism also comprises a clamping module arranged at the lower end part of each stand column, the lower end parts of the stand columns penetrate through the clamping modules to be hinged with the ground, the tightness of the clamping modules is controlled to adjust whether the stand columns are in an upright state, and the cross beams are hinged with the stand columns. The first force application mechanism and the second force application mechanism are used for simulating all external forces in an earthquake. A wall mechanism for simulating a wall. The invention has the advantages that: the house in the earthquake is simulated by building a house frame mechanism, the first force application mechanism and the second force application mechanism realize the swing of the house in various directions when the earthquake is simulated, and when the state of the earthquake is required to be simulated, the clamping module is in a loose state; when the state when the earthquake does not exist needs to be simulated, the clamping module is in a clamping state, and the upright column is ensured.

Description

System for simulating house collapse
Technical Field
The invention relates to the field of buildings, in particular to a system for simulating house collapse.
Background
Earthquake is a natural phenomenon, and earthquake waves can not kill people, people on open land can lie down at best, and direct killers for residents are collapsed houses, landslide landslides and debris flow in the afterward storm. People rely on houses for shielding wind and rain, and if the houses are not resistant to earthquake, the houses become burial places of people when earthquakes come. The earthquake disaster statistics of the past times show that 95 percent of people death in the earthquake is caused by the collapse of the building.
Therefore, a system for simulating house collapse is urgently needed in order for the masses to experience the state of earthquake or train rescue teams.
Disclosure of Invention
To overcome the above-mentioned prior art, the present invention provides a system for simulating house collapse.
In order to achieve the purpose, the invention adopts the following technical scheme:
a system for simulating house collapse comprises,
the house frame mechanism comprises four vertical columns and four cross beams for connecting the upper end parts of two adjacent vertical columns, and further comprises a clamping module arranged at the lower end part of each vertical column, the lower end parts of the vertical columns penetrate through the clamping modules to be hinged with the ground, the tightness of the clamping modules is controlled to adjust whether the vertical columns are in an upright state, and the cross beams are hinged with the vertical columns;
the first force application mechanism and the second force application mechanism are used for simulating all external forces in an earthquake;
and the wall mechanism is used for simulating a wall and is arranged between two adjacent upright posts.
In detail, the first force applying mechanism comprises a motor, a roller connected with the motor through a coupling, and a first rope wound on the roller, wherein the other end of the first rope pulls the house frame mechanism.
In detail, the first force application mechanism further comprises a first vertical rod, a first pulley is fixed on the first vertical rod, the first rope is wound around the first pulley, and the first pulley can move up and down on the first vertical rod.
In detail, the second force application mechanism comprises a balancing weight, a second pulley and a second rope, one end of the second rope is connected with the balancing weight, and the other end of the second rope is connected to the house frame mechanism by bypassing the second pulley.
In detail, the first force application mechanism and the second force application mechanism are both provided with two sets, the four force application mechanisms are respectively connected with the four stand columns, the force application directions of one first force application mechanism and one second force application mechanism to the house frame mechanism are opposite, the first force application mechanism and the second force application mechanism are respectively arranged at the same horizontal height position of two opposite stand columns in the house frame mechanism, and the force application directions of the other first force application mechanism and the other second force application mechanism to the house frame mechanism are opposite, and the other first force application mechanism and the other second force application mechanism are respectively arranged at the same horizontal height position of the other two stand columns.
In detail, the included angles between the force application directions of the first force application mechanism and the second force application mechanism and the horizontal direction of the wall moving plates in the two directions on the adjacent stand columns are both 135 degrees.
In detail, press from both sides tight module including fixing the boss on ground, the middle part of boss is provided with the hole that is greater than the stand diameter in the direction of height, be provided with the three-jaw chuck on the boss, the axis in three-jaw chuck and the axis coincidence in hole.
In detail, the system is still including setting gradually fixed plate, support, rotating shaft festival, roof beam lug between stand and crossbeam, a side of fixed plate is fixed on the stand terminal surface, and the support is fixed on the another side of fixed plate, support and rotating shaft festival are U type portion, and the tip at the crossbeam is fixed to the roof beam lug, the U type portion of rotating shaft festival passes through the second pin and is connected with the roof beam lug for the crossbeam makes a round trip to rotate on the plane on perpendicular to fixed plate and perpendicular to ground around the axis of second pin, the bottom of rotating shaft festival U type portion is fixed in the U type portion of support through first pin, makes a round trip to rotate on the plane that is perpendicular to fixed plate and is on a parallel with ground around the axis of first pin.
In detail, a groove coinciding with the central axis of the upright column is arranged at the joint of the upright column and the first force application mechanism and the second force application mechanism, a clamping ring is arranged in the groove, and the first force application mechanism and the second force application mechanism apply force to the upright column through the clamping ring.
In detail, wall support plates parallel to the length direction of the upright posts are fixed on opposite surfaces of the two adjacent upright posts, a plurality of wall moving plates are hinged between the two wall support plates, and notches which are close to the clamping rings and avoid contact with the clamping rings are arranged on the wall support plates.
The invention has the advantages that:
(1) according to the invention, a house frame mechanism is built to simulate a house in the earthquake, the first force application mechanism and the second force application mechanism realize the swinging of the house in various directions when the earthquake is simulated, and when the state of the earthquake is required to be simulated, the clamping module is in a loose state; when the state when the earthquake does not exist needs to be simulated, the clamping module is in a clamping state, and the upright column is ensured.
(2) The invention adjusts whether the upright post is in an upright state or not through the three-jaw chuck.
(3) The force application directions of the first force application mechanism and the second force application mechanism enable the house frame mechanism to collapse in any direction.
(4) The hinging between the upright post and the cross beam and the hinging between the upright post and the ground facilitate the house frame mechanism to collapse towards any direction.
Drawings
FIG. 1 is an isometric view of a simulated house collapse system of the present invention;
FIG. 2 is a fragmentary view of a first force applying mechanism in the device;
FIG. 3 is a fragmentary view of a second force applying mechanism in the device;
FIG. 4 is a partial view of the hinge between the vertical and horizontal beams of the apparatus;
fig. 5 is a partial view of a wall mechanism in the apparatus.
The notations in the figures have the following meanings:
1-beam 2-column 201-groove 3-three-jaw chuck 4-boss
5-first vertical rod 6-first rope 7-roller 8-motor 9-clamping ring
10-lifting hook 11-counterweight block 12-fixing plate 13-support 14-first pin
15-bearing 16-rotating shaft joint 17-wall support plate 1701-notch 18-wall moving plate
19-second pin 20-second upright 21-second rope 22-first pulley
23-second Pulley 25-Beam bump
Detailed Description
As shown in fig. 1, a system for simulating house collapse is characterized by comprising,
the house frame mechanism comprises four vertical columns 2 and four cross beams 1 for connecting the upper end parts of two adjacent vertical columns 2, and further comprises a clamping module arranged at the lower end part of each vertical column 2, wherein the lower end parts of the vertical columns 2 penetrate through the clamping modules to be hinged with the ground, the tightness of the clamping modules is controlled to adjust whether the vertical columns 2 are in an upright state, and the cross beams 1 are hinged with the vertical columns 2;
the first force application mechanism and the second force application mechanism are used for simulating all external forces in an earthquake, and the forces of the first force application mechanism and the second force application mechanism acting on the house frame mechanism are opposite;
the wall mechanism is used for simulating a wall, wall support plates 17 parallel to the length direction of the two adjacent columns 2 are fixed on the opposite surfaces of the two adjacent columns 2 through welding, and 5 wall moving plates 18 are hinged between the two wall support plates 17. The hinging of the wall brackets 17 and wall shifting plates 18 simulates the wall of a house. The wall shifting plate 18 is centered in the middle of the column 2 and prevents the wall brackets 17 from contacting the beam or clamping module. When the house frame mechanism moves, the wall mechanism can simulate the situation that cracks and distortion appear on the wall.
As shown in fig. 5, a groove 201 coinciding with the central axis of the upright 2 is provided at the joint of the upright 2 and the first and second forcing mechanisms, a clamping ring 9 is provided in the groove 201, and the first and second forcing mechanisms force the upright 2 through the clamping ring 9. The wall plate 17 is provided with a notch 1701 close to the clamping ring 9 avoiding contact with the clamping ring 9.
As shown in fig. 2, the first force application mechanism is a motor 8 dragging mechanism, and includes a motor 8, a first vertical rod 5, a roller 7 connected to the motor 8 through a coupling, and a first rope 6 wound on the roller 7, and the other end of the first rope 6 pulls the house frame mechanism. A first pulley 22 is fixed on the first vertical rod 5, the first rope 6 is wound around the first pulley 22, and the first pulley 22 can move up and down on the first vertical rod 5. The function of the first pulley 22 is to ensure the angle of the first rope 6 between the first pulley 22 and the clamping ring 9 with the ground for a smoother power supply wherever the motor 8 is placed. In this embodiment the first pulley 22 and the first rope 6 of the holder 13 of the clamping ring 9 are parallel to the ground.
As shown in fig. 3, the second force applying mechanism is a counterweight mechanism, and includes a counterweight 11, a hook 10, a second pulley 23, a second rope 21, and a second upright rod 20, wherein one end of the second rope 21 is connected to the counterweight 11 through the hook 10, and the other end is connected to the building frame mechanism by bypassing the second pulley 23 disposed on the second upright rod 20. The purpose of the second forcing mechanism is to power the house frame structure.
The first force application mechanisms and the second force application mechanisms are two sets, the four force application mechanisms are respectively connected with the four stand columns 2, the force application directions of one of the first force application mechanisms and one of the second force application mechanisms to the house frame mechanism are opposite, the first force application mechanisms and the second force application mechanisms are respectively arranged at the same horizontal height positions of the two stand columns 2 opposite to each other in the house frame mechanism, the force application directions of the other first force application mechanisms and the other second force application mechanisms to the house frame mechanism are opposite, and the other first force application mechanisms and the other second force application mechanisms are respectively arranged at the same horizontal height positions of the other two stand columns. In this embodiment, the force application levels of the four force application mechanisms are all the same.
The included angles between the force application directions of the first force application mechanism and the second force application mechanism and the horizontal direction of the wall moving plate 18 on the adjacent upright posts 2 in two directions are both 135 degrees. This provides power to the building frame structure in various directions.
The clamping module comprises a boss 4 fixed on the ground through threaded connection, a hole larger than the diameter of the stand column 2 is formed in the middle of the boss 4 in the height direction, a three-jaw chuck 3 is arranged on the boss 4, and the central axis of the three-jaw chuck 3 coincides with the central axis of the hole. After the clamping module is loosened, the house frame mechanism can move towards the preset direction under the action of the first force application mechanism and the second force application mechanism, and the purpose of house shaking during earthquake simulation is achieved. Wherein the three-jaw chuck 3 is electrically driven.
As shown in fig. 4, the system further includes a fixing plate 12, a support 13, a rotating shaft joint 16 and a beam bump 25 sequentially arranged between the upright column 2 and the cross beam 1, one side surface of the fixing plate 12 is fixed on the end surface of the upright column 2, the support 13 is fixed on the other side surface of the fixing plate 12, the support 13 and the rotating shaft joint 16 are both U-shaped portions, the beam bump 25 is fixed at the end portion of the cross beam 1, the U-shaped portion of the rotating shaft joint 16 is connected with the beam bump 25 through a second pin 19, so that the cross beam 1 rotates back and forth on the plane perpendicular to the fixing plate 12 and perpendicular to the ground around the central axis of the second pin 19, the bottom of the U-shaped portion of the rotating shaft joint 16 is fixed in the U-shaped portion of the support 13 through a first pin 14, and the rotating shaft joint 16 rotates back and forth on the plane perpendicular to the fixing plate 12 and parallel to the. The round hole through which the second pin 19 passes houses the self-lubricating bearing 15, thereby reducing friction between the rotating coupling 16 and the beam projection 25. The support 13 and the rotating shaft joint 16, the rotating shaft joint 16 and the beam 1 are connected through pins, the length of each pin is 2mm more than the total length of a round hole, steps are arranged at two ends of the first pin 14 and the second pin 19, threads are machined, and two sides of each pin are fixed through nuts.
The structure of fig. 4 is a hinge structure between the upright post 2 and the cross beam 1, the same hinge structure is also selected between the upright post 2 and the ground, and the two hinge structures are matched to make the house frame structure collapse towards any direction.
In this embodiment, the articulated structure can also use universal joints, or spherical joints between the upright 2 and the cross beam 1 and between the upright 2 and the ground.
The invention is not to be considered as limited to the specific embodiments shown and described, but is to be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

Claims (7)

1. A system for simulating house collapse is characterized by comprising a house frame mechanism, a first force application mechanism, a second force application mechanism and a wall mechanism;
the house frame mechanism comprises four vertically arranged stand columns (2) and four cross beams (1) for connecting the upper end parts of two adjacent stand columns (2), so that the house frame mechanism is in a square layout in the overlooking direction, the house frame mechanism further comprises clamping modules arranged at the lower end parts of the stand columns (2), the lower end parts of the stand columns (2) penetrate through the clamping modules to be hinged with the ground, the tightness of the clamping modules is controlled to adjust whether the stand columns (2) are in an upright state, and the cross beams (1) are hinged with the stand columns (2); wherein two upright posts (2) which are mutually connected and can form a square edge of the square layout are defined as adjacent;
the first force application mechanism and the second force application mechanism are used for simulating all external forces in an earthquake;
the wall mechanism is used for simulating a wall and is arranged between two adjacent upright posts (2);
the first force application mechanism comprises a motor (8), a roller (7) connected with the motor (8) through a coupler, a first rope (6) wound on the roller (7), and a house frame mechanism pulled by the other end of the first rope (6);
the second force application mechanism comprises a balancing weight (11), a lifting hook (10), a second pulley (23), a second rope (21) and a second upright rod (20), one end of the second rope (21) is connected with the balancing weight (11) through the lifting hook (10), and the other end of the second rope is connected to the house frame mechanism by bypassing the second pulley (23) arranged on the second upright rod (20);
the first force application mechanism and the second force application mechanism are both provided with two sets, the four force application mechanisms are respectively connected with the four upright posts (2), one of the first force application mechanisms and one of the second force application mechanisms are arranged diagonally and opposite to each other in force application direction to the house frame mechanism, and the other one of the first force application mechanisms and the other one of the second force application mechanisms are arranged diagonally and opposite to each other in force application direction to the house frame mechanism;
the first force application mechanism further comprises a first vertical rod (5), a first pulley (22) is fixed on the first vertical rod (5), the first rope (6) winds around the first pulley (22), and the first pulley (22) can move up and down on the first vertical rod (5).
2. A house collapse simulation system according to claim 1, wherein the first and second forcing mechanisms at diagonally opposite corners are respectively disposed at the same level of the two corresponding columns (2).
3. A house collapse simulation system according to claim 2, wherein a wall moving plate (18) is connected between two adjacent columns (2); the included angles between the force application directions of the first force application mechanism and the second force application mechanism and the wall moving plate (18) are 135 degrees.
4. A house collapse simulation system according to claim 1, wherein the clamping module comprises a boss (4) fixed on the ground, a hole larger than the diameter of the upright post (2) is formed in the middle of the boss (4) in the height direction, a three-jaw chuck (3) is arranged on the boss (4), and the central axis of the three-jaw chuck (3) is overlapped with that of the hole.
5. The system for simulating house collapse according to claim 1, further comprising a fixing plate (12), a bracket (13), a rotating shaft joint (16), and a beam bump (25) sequentially arranged between the upright column (2) and the beam (1), wherein one side surface of the fixing plate (12) is fixed on the end surface of the upright column (2), the bracket (13) is fixed on the other side surface of the fixing plate (12), the bracket (13) and the rotating shaft joint (16) are both U-shaped portions, the beam bump (25) is fixed at the end of the beam (1), the U-shaped portion of the rotating shaft joint (16) is connected with the beam bump (25) through a second pin (19), so that the beam (1) rotates around the central axis of the second pin (19) on the plane perpendicular to the fixing plate (12) and the ground, the bottom of the U-shaped portion of the rotating shaft joint (16) is fixed in the U-shaped portion of the bracket (13) through a first pin (14), the rotating shaft joint (16) is rotated back and forth around the central axis of the first pin (14) in a plane perpendicular to the fixed plate (12) and parallel to the ground.
6. A house collapse simulation system according to claim 1, wherein a groove (201) coinciding with the central axis of the upright (2) is arranged at the joint of the upright (2) and the first and second forcing mechanisms, a clamping ring (9) is arranged in the groove (201), and the first and second forcing mechanisms force the upright (2) through the clamping ring (9).
7. A house collapse simulation system according to claim 6, wherein wall support plates (17) parallel to the length direction of the uprights (2) are fixed on the uprights (2), and a plurality of wall moving plates (18) between two adjacent uprights (2) are connected between the adjacent uprights (2) through hinging with the wall support plates (17); the wall plate (17) is provided with a notch (1701) at the clamping ring (9) that avoids contact with the clamping ring (9).
CN201810457082.0A 2018-05-14 2018-05-14 System for simulating house collapse Active CN108630085B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810457082.0A CN108630085B (en) 2018-05-14 2018-05-14 System for simulating house collapse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810457082.0A CN108630085B (en) 2018-05-14 2018-05-14 System for simulating house collapse

Publications (2)

Publication Number Publication Date
CN108630085A CN108630085A (en) 2018-10-09
CN108630085B true CN108630085B (en) 2020-12-29

Family

ID=63692964

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810457082.0A Active CN108630085B (en) 2018-05-14 2018-05-14 System for simulating house collapse

Country Status (1)

Country Link
CN (1) CN108630085B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7029164B2 (en) * 2017-02-06 2022-03-03 ヤマト商工有限会社 Training equipment and training system
CN113684939A (en) * 2021-06-30 2021-11-23 王超越 Earthquake resisting system for magnetic suspension house

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201060268Y (en) * 2007-06-08 2008-05-14 上海市宝山区青少年科学技术指导站 Building structure earthquake tester
CN102444674A (en) * 2010-10-11 2012-05-09 鸿富锦精密工业(深圳)有限公司 Cardan joint with three degrees of freedom
CN104084613A (en) * 2014-04-24 2014-10-08 浙江吉利控股集团有限公司 Chuck self-locking control device
CN107967859A (en) * 2018-01-15 2018-04-27 安徽新视野科教文化股份有限公司 One kind simulation electric pole rocks fracture apparatus for demonstrating

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202741779U (en) * 2012-06-18 2013-02-20 昆山市威纶五金电子有限公司 Vertical drilling machine with vertical clamping device
CN104440173A (en) * 2014-11-25 2015-03-25 常州市印宝镍网有限公司 Lathe tailstock clamp
CN105735722B (en) * 2016-02-15 2017-10-31 王家兴 A kind of electric tower of the antidetonation with soft varying stress
CN206601881U (en) * 2016-08-24 2017-10-31 尚颖教育科技(北京)有限公司 A kind of earthquake simulator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201060268Y (en) * 2007-06-08 2008-05-14 上海市宝山区青少年科学技术指导站 Building structure earthquake tester
CN102444674A (en) * 2010-10-11 2012-05-09 鸿富锦精密工业(深圳)有限公司 Cardan joint with three degrees of freedom
CN104084613A (en) * 2014-04-24 2014-10-08 浙江吉利控股集团有限公司 Chuck self-locking control device
CN107967859A (en) * 2018-01-15 2018-04-27 安徽新视野科教文化股份有限公司 One kind simulation electric pole rocks fracture apparatus for demonstrating

Also Published As

Publication number Publication date
CN108630085A (en) 2018-10-09

Similar Documents

Publication Publication Date Title
CN108630085B (en) System for simulating house collapse
US6868646B1 (en) Method and means for erecting a wind energy tower
WO2022253211A1 (en) Spatial vertical rotation construction method for steel structure roof of large venue
CN106758805B (en) A kind of Bridge Testing Equipment and its application method based on VR virtual reality technologies
CN108051178B (en) A kind of experimental rig
KR102012006B1 (en) Unmanned Appearance Inspection Devices and Methods of High-Rise Buildings Using Guide Cables
CN201794320U (en) Rotationally-built and quickly-assembled unit movable house
CN110943405A (en) Environmental protection cable support for municipal works
US3181650A (en) Portable tower construction
RU2651738C1 (en) Mast with direction stabilized upper working platform
CN213297070U (en) Large-span ultrahigh-degree steel structure net rack construction work platform
CN212448143U (en) Inspection device for high-voltage cable
CN207000757U (en) A kind of PVD over-water constructions special purpose ship
CN108979290B (en) Detachable device and method for manually assembling steel column
CN214697176U (en) Pole setting device of outdoor high altitude monitoring pole
CN112002208A (en) Teaching and practical training device for assembling of beam column of fabricated building
CN219689177U (en) Lattice column diagonal bracing connection node
CN221143804U (en) Building site fast-assembling isolating device
CN210802843U (en) Double-slope roof movable house roof wind suction simulation loading device
CN215343348U (en) Lightning rod for lightning protection grounding
CN217925302U (en) Rail transit is rail guard for transportation construction
CN213038585U (en) Net rack standard knot jacking device
CN213131688U (en) Collapsible portable fire extinguisher strorage device
CN219617063U (en) Lifting frame assembly gap adjusting device
CN219227742U (en) Small-size communication base station that wind-resistant ability is strong

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant